Hi There, my first post. Great forum BTW. I have a 2012 X35. No major issues with the B.I.G. system other than it is finicky, to say the least. The two questions/comments I have are:

The timers on all three tanks run way too long, my sides are full at less than 50% and my center tank is full around 60%. Anyone else have this issue and is there a way to fix it?

Also, I was told by the dealer not to fill the tanks without the motor running and at 1,500 rpm! This seems a bit conservative to me, I have filled them all with the motor off, running a Tsunami pump and the stereo playing, and have not seen any problems. Certainly not required to run the motors when filling tanks on a Malibu.

Hi There, my first post. Great forum BTW. I have a 2012 X35. No major issues with the B.I.G. system other than it is finicky, to say the least. The two questions/comments I have are:

The timers on all three tanks run way too long, my sides are full at less than 50% and my center tank is full around 60%. Anyone else have this issue and is there a way to fix it?

Also, I was told by the dealer not to fill the tanks without the motor running and at 1,500 rpm! This seems a bit conservative to me, I have filled them all with the motor off, running a Tsunami pump and the stereo playing, and have not seen any problems. Certainly not required to run the motors when filling tanks on a Malibu.

Thanks in advance for your help.

I had problems on my 04 X-Star filling the ballasts when not running the engine. The kgb tank would fill but not port or starboard at the same time.

Thanks for the note, my issue is not that the tanks are not filling, they are just filling and emptying faster than the timers and there does not seem to be a method to adjust the timer. I think there used to be a method on some of the older B.IG. set ups, but I can't seem to find it on my system.

The engine rpm req is so the pumps operate to their full potential. Will the run without the rpm boost sure, but that extra powerboost from the engine output on the alternator will give you the maximum performance for the pumps.

It's very easy to notice of u listen to the actual pump motor in both cases with engine off/Idle and at 1500+ rpms